Masters Theses

Date of Award

6-1981

Degree Type

Thesis

Degree Name

Master of Science

Major

Engineering Science

Major Professor

Mitsuru Kurosaka

Committee Members

Robert L. Young, Jain-Ming Wu

Abstract

This thesis is concerned with the effect of heat transfer on steady transonic flow in a two-dimensional, convergent-divergent duct. The problem was studied by means of experiments in a combustion tunnel.

An experimental investigation to determine the shock position and sonic line was carried out at total pressures ranging between 4 and 20 psig, total temperatures between 40 and 1000°F and wall temperatures between 50 and 900°F. Detailed duct wall pressures and shock positions were obtained for various expansion ratios and wall-to-fluid temperature ratios. The two-dimensionality of the duct flow was verified by wall pressure measurements. In addition, the fact that the flow was turbulent was verified.

For the experimental conditions investigated, it was confirmed that the change of the sonic line due to the effect of the heat transfer was small. However, the displacement thickness downstream of the shock became markedly thinner as the duct walls were cooled. Thus the position of the shock was shifted by wall cooling. The extent of the shock movement in the present experiment was of the same order as the throat height for the expansion ratio pe/pt of about 0.5 and wall-to-fluid temperature ratio Tw/Tt of approximately 0.5.

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